Fig. 2From: Labral calcification plays a key role in hip pain and symptoms in femoroacetabular impingementSynovial inflammation features. Synovial tissue from one representative FAI patient. a Hematoxylin and eosin (H&E) staining showed no monocytic cellular infiltration, mild hyperplasia, focal/perivascular fibrosis, and mild increase of vascularization. b CD68 immunopositive cells (red precipitate). Scale bar, 100 μmBack to article page